Abstract: A method for transmitting ACARS messages over IP, between a transmitter and a receiver, includes dividing an ACARS message of a first application into a plurality of blocks. For each block of the message, except for the last, a dummy acknowledgment of receipt of the block is locally sent back at the transmitter to the application. When the transmitter receives from the receiver a message indicating proper reception of the plurality of transmitted blocks, the method further includes generating an acknowledgment of receipt of the last block before sending the acknowledgement of receipt back to the application.

Abstract: The present invention relates to a method for transmitting ACARS messages over IP, between a transmitter and a receiver, an ACARS message (M) of a first application being divided into a plurality of blocks (B1, B2, . . . Bn). For each block of said message, except for the last, a dummy acknowledgment of receipt , . . . , of said block is locally sent back at the transmitter to said application, when the transmitter receives from the receiver a message (D(ackC), S(ackC), S(ackC, ack1tcp), U(e, B?1, . . . , B?n?ackC)), indicating proper reception of said plurality of transmitted blocks, it generates an acknowledgment of receipt (ackn) of the last block before sending it back to said application.